Purpose: The rise of social media has caused a shift in organizational practices, giving rise, in some cases, to genuinely "mediatized" organizations. With the present paper, we aim to explore how communications managers employ social media to influence their professional impressions. Design: Analyzing a sample of 679 European communications professionals, we explore with factor and cluster analysis these emerging impression management tactics as well as how managers promote, involve, assist and reproach using social media. Findings: We distinguish four patterns of online impression management: Self Promotion, Assistance Seeking, Peer Support and Authority. Because different professional duties may require different approaches to impression management, we furthermore cluster for managerial roles, showing that in the shaping of formal or informal online roles, communication professionals convey different impressions depending on their degree of online confidence and strategic purpose for using social media. Originality: This contribution enriches the existing literature first by shedding light on impression management tactics used for social media within a professional context, concurrently exploring the effect of variables such as the extent and purpose of social media activity, the privacy concerns of managers and their roles within the organization. Second, it proposes a typology of social media impression management tailored to the reality of managers, with the aim of presenting a specific tool for understanding managerial self-communication through social media, classifying and predicting professional behaviors.